The word(s) "duty" appears 132 time(s) in 121 verse(s) in Quran in Muhammad Pickthal translation.

(81) Rather keep your duty to Allah, and obey me.

(82) Keep your duty toward Him Who hath aided you with (the good things) that ye know,

(83) So keep your duty to Allah and obey me.

(84) Therefor keep your duty to Allah and obey me,

(85) So keep your duty to Allah and obey me.

(86) So keep your duty to Allah and obey me.

(87) And keep your duty unto Him Who created you and the generations of the men of old.

(88) And Abraham! (Remember) when he said unto his folk: Serve Allah, and keep your duty unto Him; that is better for you if ye did but know.

(89) Turning unto Him (only); and be careful of your duty unto Him and establish worship, and be not of those who ascribe partners (unto Him);

(90) O mankind! Keep your duty to your Lord and fear a Day when the parent will not be able to avail the child in aught, nor the child to avail the parent. Lo! Allah's promise is the very truth. Let not the life of the world beguile you, nor let the deceiver beguile you, in regard to Allah.